A hedge-fund manager who worked for billionaire George Soros paid a nanny a measly $4.16 an hour while forcing her to sleep on the floor of his luxury Fifth Avenue pad, a lawsuit charges….

“While the defendants indulgently enjoyed an opulent lifestyle that is available only for New York’s ultra rich, [the nanny] slaved away 18 hours a day without respite, and . . . her days and nights were punctuated by a pervasive stream of ethnic slurs that were inflicted upon her by Ms. Davy,” Puerta’s lawyer, Marc Rapaport, told The Post, citing court papers….